COMPOSITION FOR OBTAINING RIGID FOAMPOLYURETHANE Russian patent published in 2008 - IPC C08G18/12 C08L75/04 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry of polymers, namely, to compositions for obtaining rigid foampolyurethane, used as heat-insulating materials in different fields of technology, in particular for multi-layer building boards with intermediate layer of foampolyurethane. Composition for obtaining rigid foampolyurethane includes simple low-molecular and high-molecular polyethers, polyol, surface-active substance, nitrogen-containing and alkali catalysts, foaming agents, inhibitors of burning and polyisocyanate, which differs by the following: inhibitor of burning is a mixture of tris-(2-chloroethane)-phosphate and calcium tartrate or magnesium sulphide in ratio 1:0.05-0.2 with the following ratio of ingredients, mass fraction: polyether with MW 300-800 50.0-75.0; polyether with MW 3000-6000 1.5-7.5; polyol 3.0-10.0; surface-active substance 1.0-2.0; dimethylethanolamine 0.5-3.0; foaming agents 3.0-10.0; alkaline catalyst 0.05-0.5; inhibitor of burning 20-28; polyisocyanate 150. Use of tris-(2-chloroethane)-phosphate and calcium tartrate or magnesium sulphide in composition as inhibitor of burning results in reduction of amount of inhibitor of burning used in composition, stabilisation of foam formation and increase of strength indices of rigid foampolyurethane.

EFFECT: reduction of amount of inhibitor of burning used in composition for obtaining rigid foampolyurethane, stabilisation of foam formation and increase of strength indices of rigid foampolyurethane.

1 tbl, 1 cl